A CMOS Pixel With Embedded ADC, Digital CDS and Gain Correction Capability for Massively Parallel Imaging Array

Miron Kłosowski; Waldemar Jendernalik; Jacek Jakusz; Grzegorz Blakiewicz; Stanisław Szczepański

doi:10.1109/tcsi.2016.2610524

A CMOS Pixel With Embedded ADC, Digital CDS and Gain Correction Capability for Massively Parallel Imaging Array

Abstract

In the paper, a CMOS pixel has been proposed for imaging arrays with massively parallel image acquisition and simultaneous compensation of dark signal nonuniformity (DSNU) as well as photoresponse nonuniformity (PRNU). In our solution the pixel contains all necessary functional blocks: a photosensor and an analog-to-digital converter (ADC) with built-in correlated double sampling (CDS) integrated together. It is implemented in standard 0.18 μm CMOS technology. The size of the pixel with 9-bit resolution is 21 μm x 21 μm. Measurements of the 128 x 128 pixel array confirm functionality of the proposed solution. CDS reduces dark FPN from 12 LSB (3%) to 0.8 LSB (0.2%) and light FPN from 14 LSB (3.7%) to 7 LSB (1.8%). Further reduction of the light FPN (to ~1 LSB) was achieved by compensating PRNU using massively parallel innovative digital multiplication which features good resolution (1/511), does not disturb CDS executed at the same time, and can be implemented within a small pixel area.

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Publication version: Accepted or Published Version
DOI:: Digital Object Identifier (open in new tab) 10.1109/TCSI.2016.2610524
License: Copyright (2016 IEEE)

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Category:: Articles
Type:: artykuł w czasopiśmie wyróżnionym w JCR
Published in:: IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS no. 64, pages 38 - 49,
ISSN: 1549-8328
Language:: English
Publication year:: 2017
Bibliographic description:: Kłosowski M., Jendernalik W., Jakusz J., Blakiewicz G., Szczepański S.: A CMOS Pixel With Embedded ADC, Digital CDS and Gain Correction Capability for Massively Parallel Imaging Array// IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS. -Vol. 64, iss. 1 (2017), s.38-49
DOI:: Digital Object Identifier (open in new tab) 10.1109/tcsi.2016.2610524
Verified by:: Gdańsk University of Technology